Web designer

hello the job is to ;-

i need a web-site built , for ecommerce to take automated payments from customers on the "built website".

then the website once taken the customers payment needs to then take that payment VIA;-
a automated "payment method" system
to a 3rd party website

(the 3rd party website, a wholesale website.)

the automated system needs to take payment from "my built website" ECOMMERCE RETAIL PRICE OF ITEM
and pay (the 3rd party website, a wholesale website.)WHOLESALE PRICE OF ITEM,
for item bought ORIGINALLY on "my built website"

ALSO THE JOB
the build of website also needs to upload xml/csv files and fully stock the website
+ there needs to be a customizable page for me to edit all items after all stock has been uploaded so i can change item picture text and price
+ the web site needs to be of the standard of http://www.headict.com/ website

a fully modern ecommerce website
thankyou